e2e mysql source additional tests #1153

Job	Run time
build (mysql-plugin)	1h 33m 38s
build (postgresql-plugin)	33m 0s
build (oracle-plugin)	2h 3m 56s
build (mssql-plugin)	1h 17m 47s
build (cloudsql-mysql-plugin)	1h 14m 30s
build (cloudsql-postgresql-plugin)	7m 30s
	6h 50m 21s

Provide feedback